attribute vec4 a_position;  
attribute vec2 a_texCoord;  
attribute vec4 a_color;  
                      
varying vec4 v_fragmentColor;  
varying vec2 v_texCoord;  
                                  
void main()   
{                             
    gl_Position = CC_PMatrix * a_position;  
    v_fragmentColor = a_color;  
    v_texCoord = a_texCoord;  
}  